EP2066741A2 - Composition de revetement depolluant ameliore - Google Patents
Composition de revetement depolluant amelioreInfo
- Publication number
- EP2066741A2 EP2066741A2 EP07853635A EP07853635A EP2066741A2 EP 2066741 A2 EP2066741 A2 EP 2066741A2 EP 07853635 A EP07853635 A EP 07853635A EP 07853635 A EP07853635 A EP 07853635A EP 2066741 A2 EP2066741 A2 EP 2066741A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- coating composition
- titanium dioxide
- coating
- particles
- styrene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/36—Compounds of titanium
- C09C1/3607—Titanium dioxide
- C09C1/3653—Treatment with inorganic compounds
- C09C1/3661—Coating
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D125/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
- C09D125/02—Homopolymers or copolymers of hydrocarbons
- C09D125/04—Homopolymers or copolymers of styrene
- C09D125/06—Polystyrene
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
- C09D183/06—Polysiloxanes containing silicon bound to oxygen-containing groups
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1606—Antifouling paints; Underwater paints characterised by the anti-fouling agent
- C09D5/1612—Non-macromolecular compounds
- C09D5/1618—Non-macromolecular compounds inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1687—Use of special additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/66—Additives characterised by particle size
- C09D7/69—Particle size larger than 1000 nm
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/18—Spheres
- C08L2205/20—Hollow spheres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/06—Polystyrene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
- Y10T428/31609—Particulate metal or metal compound-containing
- Y10T428/31612—As silicone, silane or siloxane
Definitions
- This invention relates to an improved coating composition useful for the formation of a depolluting and/or antifouling coating on the surface of a substrate.
- Conventional methods for making the surface of materials soil cleaning comprises treating the surface to confer the ability to remove stains or sous deposited on the surface.
- excellent oxidative degradation activity of a photocatalyst fixed onto the surface is utilized to degrade organic matter or stains or soils deposited on the surface and also any gaseous pollution which comes into contact with the surface.
- UV-illumi ⁇ ated catalyst such as titanium dioxide
- absorbs UV light which produces electrons and holes that migrate to the surface of the catalyst.
- the electrons reduce adsorbed oxygen, while the holes oxidize organic compounds or adsorbed water molecules.
- the invention is a coating composition
- a coating composition comprising photocatalytic titanium dioxide particles, an opacifying agent, a silicone compound, de-HNO3 particles, styrene resin hollow microspheres, and a solvent.
- the coating compositions demonstrate unexpectedly improved opacity and durability compared to coatings that do not contain a combination of a silicone compound and styrene resin hollow microspheres.
- the coating composition of the invention comprises photocatalytic titanium dioxide particles.
- photocatalytic titanium dioxide particles refers to titanium dioxide particles which, when exposed to light of any wavelength, can cause excitation (photoexcitation) of electrons in the valence band to produce conduction band electrons and leaving holes in the valence band.
- the photocatalytic titanium dioxide particles may be any type of titanium dioxide.
- the photocatalyti ⁇ titanium dioxide particles are anatas ⁇ , rutile or mixtures thereof.
- the photocatalytic titanium dioxide particles are predominantly anatase, as determined by X-ray diffraction patterns. By predominantly anatase, it is meant that the nanoparticles are at least 80 percent anatase, and most preferably greater than 95 percent anatase.
- the anatase form of titanium dioxide is especially preferred for its higher photoactivity.
- the photocatalytic titanium dioxide particles may be preferably modified by the addition of other elements from the periodic table to enhance photoactivity at longer wavelengths and into the visible part of the spectrum.
- the crystalline anatase titanium dioxide particles preferably have a mean particle size of between 2 and 100 nm, more preferably between 5 and 50 nm, and most preferably between 5 and 40 nm.
- the diameters may be measured by transmission electron microscopy (TEM) and also X-ray diffraction (XRD).
- the photocatalytic particles have a high surface area of greater than 30 m 2 /g, more preferably above 50 m 2 /g, and most preferably greater than about 100 m 2 /g, as measured by the BET method.
- Suitable photocatalytic titanium dioxide particles may be purchased from
- the photocatalytic titanium dioxide particles may also be prepared by any process known in the art. Processes for preparing photocatalytic titanium dioxide particles are well known in the art. See, for example, U.S. Pat. No. 4,012,338, which is incorporated herein by reference.
- the photocatalytic titanium dioxide particles are preferably present in an amount of from 0.5 to 20%, more preferably 1 to 15%, and most preferably 1 to 12%, by weight of total weight of the composition.
- the photocatalytic titanium oxide particles may be introduced in the composition as a sol prepared by dispersion in a dispersant, as a water-or solvent-containing paste, or as a powder.
- a dispersant used to prepare a sol include water, alcohols such as methanol, ethanol, isopropanol, n-butanol and isobutanol, and ketones such as methyl ethyl ketone and methyl isobutyl ketone.
- the coating composition of the invention also comprises an opacifying agent.
- the opacifying agent suitable for the invention includes any organic or inorganic compound that is able to provide hiding power to the coating, including pigments, colorants and/or fillers. More preferably, the opacifying agent is titanium dioxide.
- Pigmentary titanium dioxide preferably has a particle size in the range of from 0.2 to 0.5 ⁇ m, thus is significantly larger in particle size compared to the photocatalytic titanium dioxide particles. Titanium dioxide pigments which have had their phptoactivity reduced by surface treatment are disclosed in, for example, U.S. Pa
- a coated titanium dioxide that has been treated with at least one inorganic oxide coating, such as aluminum oxide, silicon dioxide, zirconium oxide, and the like.
- inorganic oxide coating such as aluminum oxide, silicon dioxide, zirconium oxide, and the like.
- Processes to deposit metal oxides onto a titanium dioxide are well known to those skilled in the art.
- the metal oxides are added by wet treatment or by gas-phase deposition. Suitable wet treatment techniques are taught in U.S. Pat Nos. 3,767,455, 4,052,223, and 6,695,906, the teachings of which are incorporated herein by reference.
- gas-phase deposition techniques are taught in U.S. Pat. Nos. 5,562,764 and 6,852,306, the teachings of which are incorporated herein by reference.
- a silicon dioxide coating on the surface of the pigmentary titanium dioxide is formed by the addition of a silica compound.
- Suitable silica compounds include water soluble alkali metal silicates.
- Preferred alkali metal silicates include sodium silicate, potassium silicate and the like.
- the silica compound is sodium silicate.
- a zirconium dioxide coating is formed by the addition of a zirconia compound.
- Zirconia compounds suitable for use in the present invention include the acidic salts of zirconia such as zirconium oxychloride, zirconyl sulphate and the like.
- the zirconia compound is zirconium oxychloride or zirconyl sulphate.
- hydrous forms of alumina or aluminium hydroxides may be precipitated from salts such as aluminium sulphate or sodium aluminate, typically in the range of 0.5 to 10%.
- the coated titanium dioxide pigment may be treated with polyalcohols such as trimethylolethane and tiimethylolpropane, alkanolamines such as trietbanolamine, phosphates, and mixtures thereof.
- the • phosphate compound is formed from a water soluble phosphate compound, such as for example, tetrapotassium pyrophosphate, sodium polyphosphate, tetrasodium pyrophosphate (Tetron), sodium tripolyphosphate, potassium tripolyphosphate, sodium hexametaphpsphate (Calgon), phosphoric acid, and the like.
- the water soluble phosphate compound is sodium hexametaphosphate.
- the titanium dioxide may first be treated with the deposition of a phosphate compound to form a contiguous layer on the base TIO 2 , followed by the deposition of a dense silica compound contiguous with the phosphate deposit, optionally a second deposition of a phosphate compound contiguous with the dense silica compound, and finally the deposition of an alumina compound.
- the titanium dioxide may be coated with a zirconia compound instead of the silica compound.
- the weight percent of phosphate can vary depending on the layer deposited on the titanium dioxide base. If the phosphate is deposited as the first layer on the titanium dioxide, the phosphate is deposited in an amount of from about 0.05% to about 1.0%, more preferably from about 0.05% to about 0.75% and most preferably, from about 0.05% to about 0.5% based upon the weight of titanium dioxide base.
- the weight percent silica deposited is preferably in an amount of from about 0.5% to about 15% by weight of silica based on the total weight of the titanium dioxide base.
- zirconium dioxide is deposited in an amount of from about 0.1% to about 5.0% by weight of zirconium dioxide based on the total weight of the titanium dioxide base.
- the amount of opacifying agent in the coating composition is preferably 0.05 to 25 percent, and more preferably 0.1 to 15 percent, by weight (expressed in dry matter) of the total weight of the coating composition.
- the coating composition of the invention also comprises a silicone compound.
- the silicone compound is any material based on silica or mixture thereof, which is able to provide a silicone based-film convenient for coating.
- the silicone compound includes at least one polysiloxane derivative.
- Preferred polysiloxanes have the formula:
- R 1 and R 2 radicals are alkyl groups (e. g. , methyl, ethyl, propyl, butyl, 2-ethylbutyl, octyl), cycloaklyl groups (e. g. , cyclohexyl, cyclopentyl), alkenyl groups (e. g. , vinyl, hexenyl, allyl), aryl groups (e. g. , phenyl, tolyl, xyfyl, naphthyl, diphenyl) aralkyl groups (e.
- alkyl groups e. g. , methyl, ethyl, propyl, butyl, 2-ethylbutyl, octyl
- cycloaklyl groups e. g. , cyclohexyl, cyclopentyl
- alkenyl groups e. g. , vinyl, hex
- Suitable polysiloxanes include Silres® BS 45 (a product of WACKER-
- the amount of silicone compound in the coating composition is preferably 0.05 to 20 percent, and more preferably 0.1 to 16 percent, by dry weight on the total weight of the coating composition.
- An organic polymer may be optionally added In addition to the silicone compound. Suitable organic polymers include acrylic polymers, polyvinyl acetates, and styrene-butadienes. Acrylic polymers Include the polymers and copolymers of acrylic add, methacrylic acid, the esters of acrylic acid and methacrylic acid, and acrylonitrile, including styrene-acrylic resins.
- the coating composition of the invention also comprises de-HNU3 particles.
- the de-HNU 3 particles are any material that is capable of removing the oxidized species HNO 3 , formed photocatalytically from NOx.
- Suitable de-HNO 3 particles include basic compounds, in particular any insoluble carbonates such as calcium carbonate, zinc carbonate, magnesium carbonate and mixtures thereof.
- the de-HNO 3 particles include calcium carbonate.
- the amount of de-HNO 3 particles in the coating composition is preferably 0.05 to 40 percent, and more preferably 0.1 to 15 percent, by weight (expressed in dry matter) of the total weight of the coating composition.
- the ratio of de-HNOa particles/photocatalytlc particles is preferably from
- 0.01 to 50 more preferably from 0.1 to 20, and most preferably from 0.2 to 5.
- the coating composition of the invention also comprises styrene resin hollow microspheres.
- the hollow resin microspheres have a cavity inside and typically have an outside diameter of less than 10 ⁇ m.
- the microspheres have an outside diameter in a range of from about 0.1 ⁇ m to about 2 ⁇ m, more preferably from about 0.2 ⁇ m to about 1 ⁇ m.
- Suitable styrene resins for the hollow resin microspheres include polystyrene, poly- ⁇ -methylstyrene, and * styrene-acrylic copolymer resins. Styrene-acrylic copolymer resins are particularly preferred.
- Suitable styrene resin hollow microspheres include Ropaque ® Ultra-E (a product of Rohm and Haas) and Dow ® HS 3000NA.
- the amount of styrene resin hollow microspheres in the composition is preferably 0.1% to 20% percent, and more preferably 2 to 15 percent, by weight (expressed in dry matter) of the total weight of the coating composition.
- the coating composition of the invention also comprises a solvent.
- Suitable solvents include water, an organic solvent, and a mixed solvent composed of water and an organic solvent.
- Water and a high boiling point esters, ethers or diols are particularly preferred, the latter organic solvents being known as coal ⁇ scents or coalescing solvents.
- the coating composition of the invention may optionally comprise other compounds, provided such an addition does not compromise the shelf life, UV durability, or depolluting properties of the resulting coating.
- additional compounds include filler (s) like quartz, calcite, clay, talc, barite and/or Na-Al-silicate; dispersants like polyphosphates, polyacrylates, phosphonates, naphthene and lignin sulfonates; wetting agents like anionic, cationic, amphoteric and non-Ionic surfactants;, defoamers like silicon emulsions, hydrocarbons, and long-chain alcohols; stabilizers like mostly cationic compounds; coalescing agents like alkali-stable esters, glycols, hydrocarbons; rheological additives like cellulose derivatives
- filler s
- dispersants like polyphosphates, polyacrylates, phosphonates, naphthene and lignin sulfonates
- wetting agents like anionic, cationic, amphoteric and non-Ionic surfactants
- defoamers like silicon emulsions, hydrocarbons, and long-chain alcohol
- a photocatalytically active coated substrate is formed by a process which comprises depositing the coating composition on a substrate material by contacting the surface of the substrate material with the coating composition.
- the coating composition of the present invention may be applied onto the surface of the substrate material * by any suitable method. Examples of suitable methods include spray coating, dip coating, flow coating, spin coating, roll coating, brush coating, and sponge coating. .
- the coating composition after the application onto the surface of the substrate is then fixed, generally by drying or curing to form an organic/inorganic layer, generally in the form of a thin film.
- drying or curing used herein means that the binders contained in the composition, according to the present invention, are converted to a film.
- drying is performed by air drying.
- the forming of the coating does not require thermal treatment at high temperatures, e.g. 50-450 0 C for several hours.
- the coating composition of the present invention may be applied on the surface of various substrate materials.
- Suitable substrate materials include, but are not limited to, metals, ceramics, glasses, woods, stones, cements, concretes, and combinations of the above materials and laminates of the above materials.
- Specific examples to which the composition may be applied include housing and building materials; exterior of the buildings; interior of the buildings; sashes; glass; structural materials; exterior of machines and articles; dustproof covers and coatings; and films, sheets and seals.
- compositions are prepared using the following materials:
- the coatings are prepared using a Dispermat ® AE01M high-speed disperser manufactured by VMA Getzmann GMBH.
- the dispersion is carried out in a 500 mL stainless steel vessel at 3,000 rpm with a 50 mm diameter dispersion impeller.
- Foamaster NXZ antifoam and Adiprex N40 are added to an aqueous solution of Natrosol 250MR (3% solution in water) under low speed stirring at 500 rpm. Then, the PC105M, Tiona 595 and Snowcal 60 are added with increasing speed up to 3,000 rpm. The pigments are dispersed for 10 minutes and then the speed is reduced to 1,000 RPM before adding water followed by the Acronal 290D emulsion polymer or the Silres BS45 polysiioxane polymer, Texanol, and Acticide SPX. For paints containing styrene-acrylic resin hollow microspheres, the Ropaque Ultra E is added last. The paint is stirred for a further 5 minutes at 1,000RPM and then transferred to a suitable sealed container.
- Coatings 1-8 are shown in Table 1. Comparative Coating # 1 is a 40% pigment volume concentration (PVC) coating containing polysiloxane, but no Ropaque Ultra E styrene resin hollow microspheres, Coating # 2 is a 40% PVC coating containing polysiloxane and Ropaque Ultra E.
- PVC pigment volume concentration
- Comparative Coating # 3 is a 60% PVC coating containing polysiloxane, but no Ropaque Ultra E.
- Coating # 4 is a 60% PVC coating containing polysiloxane and Ropaque Ultra E.
- Comparative Coating # 5 is a 40% PVC coating that contains Arconal
- Comparative Coating # 6 is a 40% PVC coating that contains Arconal 290D in place of the polysiloxane, and also contains Ropaque Ultra E.
- Comparative Coating # 7 is a 60% PVC coating that contains Arconal 290D in place of the polysiloxane, but does not contain Ropaque Ultra E.
- Comparative Coating # 8 is a 60% PVC coating that contains Arconal 290D in place of the polysiloxane, and also contains Ropaque Ultra E.
- Coatings 1-8 are tested for durability by preparing coatings on stainless steel panels and exposing them to simulated weathering conditions in a weathering machine. The amount of weight that the coating loses during the exposure is a measure of its durability.
- the stainless steel panels (75 x 150 mm; 0.75mm thick) are weighed to 0.0001 g before and after application of the paint film in order to calculate the weight of the coating.
- the panels are coated by any convenient means including brushing, spraying, spinning or by spiral rod applicator. Only the surface to be exposed is coated.
- the dry film thickness is typically in the range of 20 to 50 microns.
- the coatings are left to dry for 7 days before exposure in the Weatherometer, an Atlas Ci65A Weather-Ometer ® made by Atlas Electric Devices, Chicago.
- the light source is a 6.5 kW Xenon source emitting 0.5 VWm 2 UV at 340nm.
- the black pane! temperature is 63°C, water spray is applied for 18 minutes out of every 120 minutes, and there is no dark cycle. The results are shown in Table 2.
- EXAMPLE 3 OPACITY TEST The opacity of Coatings 1-8 is determined by measuring the scattering coefficient (measured in mils "1 ). Paints films are prepared by drawing down a coating with a spiral wound applicator on Melinex ® clear polyester film (having a thickness of 30 to 40 microns) to a dry film thickness of approximately 25 microns ⁇ The reflectances of the coating are measured using a Byk-Gardner Color-view ® spectophotometer, first with the film in contact with a white tile and second in contact with a black tile. Good optical contact is made between the paint film and the tite by applying a coating of a liquid with the same refractive index as the polyester film, such as Shellsol T (a product of Shell Chemicals).
- Shellsol T a product of Shell Chemicals
- the film thickness of the coaling is then determined by cutting out an area of paint film of approximately 15 cm 2 , corresponding to the same area on which the reflectances are determined.
- the coating plus polyester substrate is then weighed to within 0.1 mg.
- the coating is then removed from the substrate ' by immersion and cleaning in acetone and the weight of the polyester film is determined. The difference between the two weights is the weight of the paint film.
- the film thickness of the coating is determined from its weight, its known area, and the density of the coating.
- the scattering coefficients are then calculated using Kubela-Monk equations. The results are shown in Table 3.
- EXAMPLE 4 DeNOx TEST Coatings 1-4 are tested for their ability to remove NOx by the following procedure.
- the paint films, prepared as in Example 3 are first irradiated with 0.5 W/m 2 UV at 340nm for 7 days using a filtered Xenon light source (Atlas Weather-Ometer Ci65A) before carrying out the test. This either activates or increases the activity of the coatings over and above the unexposed coatings.
- the NO x that is used in the tests is NO at 450 ppb in nitrogen mixed with an equal volume of air at 50% humidity to give 225 ppb NO. NOx is measured using a Monitor Europe ML ® 9841 Nitrogen Oxides Analyzer.
- the samples are irradiated with a UV fluorescent tube which emits 10 W/m 2 UV in the range of 300- 400 nm.
- the paint film sample is placed in the test chamber of the nitrogen oxides analyzer and the chamber is sealed. NO test gas is flowed into the test chamber and the initial value of NOx in the chamber is analyzed.
- the UV lamp is then turned on and the irradiated sample is allowed to reach equilibrium (typically up to 3 minutes) before the final value of NOx in the chamber is analyzed.
- the % NOx removal is calculated by the (initial value - final value)/initial value * 100. The results are shown In Table 4.
- Comparatve Example 1 Polymer is polysiloxane polymer latex (SHres BS45) for coatings 1, 2, 3, & 4 and styrene-acrylic emulsion polymer (Acronai 290D) for coatings 5, 6, 7 & 9.
- SHres BS45 polysiloxane polymer latex
- Adcronai 290D styrene-acrylic emulsion polymer
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Nanotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Composite Materials (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Paints Or Removers (AREA)
- Catalysts (AREA)
Abstract
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/582,763 US20080097018A1 (en) | 2006-10-18 | 2006-10-18 | Depolluting coating composition |
PCT/US2007/079526 WO2008048765A2 (fr) | 2006-10-18 | 2007-09-26 | COMPOSITION de revêtement dépolluant amélioré |
Publications (2)
Publication Number | Publication Date |
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EP2066741A2 true EP2066741A2 (fr) | 2009-06-10 |
EP2066741A4 EP2066741A4 (fr) | 2010-11-17 |
Family
ID=39314717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP20070853635 Withdrawn EP2066741A4 (fr) | 2006-10-18 | 2007-09-26 | Composition de revetement depolluant ameliore |
Country Status (11)
Country | Link |
---|---|
US (4) | US20080097018A1 (fr) |
EP (1) | EP2066741A4 (fr) |
KR (1) | KR101158779B1 (fr) |
CN (2) | CN101528832A (fr) |
AU (1) | AU2007313072B2 (fr) |
BR (1) | BRPI0717606A2 (fr) |
CA (1) | CA2666335C (fr) |
MX (1) | MX2009003540A (fr) |
MY (1) | MY183055A (fr) |
SG (1) | SG175646A1 (fr) |
WO (1) | WO2008048765A2 (fr) |
Cited By (1)
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---|---|---|---|---|
US8840718B2 (en) | 2006-10-18 | 2014-09-23 | Cristal Usa Inc. | Photocatalytically active polysiloxane coating compositions |
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US7776954B2 (en) * | 2008-01-30 | 2010-08-17 | Millenium Inorganic Chemicals, Inc. | Photocatalytic coating compositions |
US20090281207A1 (en) * | 2008-05-06 | 2009-11-12 | John Stratton | De-polluting and self-cleaning epoxy siloxane coating |
CN103313793B (zh) * | 2010-11-02 | 2015-03-11 | Toto株式会社 | 光催化剂涂装体及用于此的光催化剂涂覆液 |
CN102464932B (zh) * | 2010-11-16 | 2016-03-30 | 罗门哈斯公司 | 红外反射涂料组合物 |
EP2525173B1 (fr) * | 2011-05-18 | 2018-11-21 | Whirlpool Corporation | Compartiment à fruits et légumes d'un réfrigérateur avec des moyens pour préserver la fraîcheur |
EP2532717B1 (fr) * | 2011-06-08 | 2015-07-01 | Rohm and Haas Company | Composé de réparation de paroi basé sur la microsphère |
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JP6065021B2 (ja) * | 2012-12-28 | 2017-01-25 | セイコーエプソン株式会社 | 表面被覆粒子およびその用途 |
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CN109609029A (zh) * | 2018-12-05 | 2019-04-12 | 杭州师范大学 | 一种具有延缓低分子量润滑剂释放作用的低表面能海洋防污涂料及其制备方法 |
KR102321911B1 (ko) * | 2020-02-24 | 2021-11-04 | 에코금강 주식회사 | 광촉매가 결합된 에코메쉬 제조장치 및 그 제조방법 |
CN112724734A (zh) * | 2020-12-29 | 2021-04-30 | 河北三棵树涂料有限公司 | 内墙光催化抗菌耐水腻子及其制备方法 |
CN112759994A (zh) * | 2021-01-22 | 2021-05-07 | 安徽天锦云节能防水科技有限公司 | 一种隔热保温保冷涂料及其制备方法 |
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2006
- 2006-10-18 US US11/582,763 patent/US20080097018A1/en not_active Abandoned
-
2007
- 2007-09-26 CA CA 2666335 patent/CA2666335C/fr not_active Expired - Fee Related
- 2007-09-26 SG SG2011075876A patent/SG175646A1/en unknown
- 2007-09-26 MX MX2009003540A patent/MX2009003540A/es active IP Right Grant
- 2007-09-26 MY MYPI20091224A patent/MY183055A/en unknown
- 2007-09-26 CN CNA2007800388316A patent/CN101528832A/zh active Pending
- 2007-09-26 CN CN2011102203505A patent/CN102352185A/zh active Pending
- 2007-09-26 BR BRPI0717606-6A2A patent/BRPI0717606A2/pt not_active Application Discontinuation
- 2007-09-26 WO PCT/US2007/079526 patent/WO2008048765A2/fr active Application Filing
- 2007-09-26 EP EP20070853635 patent/EP2066741A4/fr not_active Withdrawn
- 2007-09-26 AU AU2007313072A patent/AU2007313072B2/en not_active Ceased
- 2007-09-26 KR KR1020097006569A patent/KR101158779B1/ko active IP Right Grant
-
2010
- 2010-11-17 US US12/948,436 patent/US8840718B2/en not_active Expired - Fee Related
-
2014
- 2014-08-15 US US14/460,785 patent/US9228095B2/en not_active Expired - Fee Related
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2015
- 2015-10-20 US US14/887,665 patent/US20160040018A1/en not_active Abandoned
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8840718B2 (en) | 2006-10-18 | 2014-09-23 | Cristal Usa Inc. | Photocatalytically active polysiloxane coating compositions |
Also Published As
Publication number | Publication date |
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US20080097018A1 (en) | 2008-04-24 |
CN101528832A (zh) | 2009-09-09 |
US8840718B2 (en) | 2014-09-23 |
CN102352185A (zh) | 2012-02-15 |
KR101158779B1 (ko) | 2012-06-22 |
US20110059841A1 (en) | 2011-03-10 |
SG175646A1 (en) | 2011-11-28 |
MY183055A (en) | 2021-02-09 |
US20160040018A1 (en) | 2016-02-11 |
US20140357751A1 (en) | 2014-12-04 |
AU2007313072B2 (en) | 2013-02-21 |
EP2066741A4 (fr) | 2010-11-17 |
AU2007313072A1 (en) | 2008-04-24 |
CA2666335C (fr) | 2012-04-10 |
BRPI0717606A2 (pt) | 2013-10-22 |
CA2666335A1 (fr) | 2008-04-24 |
MX2009003540A (es) | 2009-07-17 |
WO2008048765A2 (fr) | 2008-04-24 |
KR20090079880A (ko) | 2009-07-22 |
US9228095B2 (en) | 2016-01-05 |
WO2008048765A3 (fr) | 2008-11-06 |
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